The Precession Elephant and the Precession Elephant 2 are the world’s leading scan heads for high-precision laser drilling, cutting and micromachining, specifically designed for demanding applications in mass production.
The new Precession Elephant 2 scan head version offers extra functionality, especially for process control and set-up. The Precession Elephant scan heads can be used with all ultra-short pulsed laser sources available on the market today.
About precession scanning
Precession scan heads allow not only the positioning of a laser beam, but also the setting of the incidence angle of the beam at each point of the workpiece,. For a drilling process, the incidence angle is also called the precession angle. When drilling a borehole with high precision, the inclination of the internal hole surface, the so-called taper angle, can only be produced in a reliable and reproducible way if a precession scan head is used. The production of defined edge angles in laser cutting or laser micromachining also requires the use of precession heads.
ABOUT THE PRECESSSION ELEPHANT AND THE PRECESSION ELEPHANT 2
The Precession Elephant and the Precession Elephant 2 are the world’s first and most used laser scan heads for precession applications. The heads are designed for high-precision laser drilling, cutting and micromachining applications. They are used 24/7 in production facilities around the world.
The Precession Elephant scan heads offer maximum flexibility for the drilling of innovative borehole-and edge geometries of differing conicity, taper angles and shapes, and allow the production of perfectly round, elliptical and custom-shaped micro holes. The Precession Elephant 2 is available for ultraviolet, green and two infrared wavelength ranges, each with two different focal lengths.
The scan heads can be used with all major ultra-short pulsed laser sources available on the market today. In addition, the new Precession Elephant 2 makes it possible to monitor the laser process and the laser beam properties during production. The new scan head offers improved particle extraction, beam attenuation control and additional functionalities designed for mass production of the highest quality. Several other options, such as tools for the setting and calibration of the polarization, simplify the set-up of the scan head and minimize downtimes for the end-user.
FOR THE PRECESSION ELEPHANT SCANHEADS, ARGES OFFERS
- laser-specific customization
- subsystems that include laser and beam path
- customer-specific software extensions
- laser process development
- sample production
Please feel free to contact ARGES or its distributors if you have any further questions.
PROCESS GAS CONTROL
Process gas control for highest possible processing quality
Process gases such as nitrogen or helium are frequently used in laser material processing to ensure the best possible results.
When using process gases, it is important not only to select a suitable protective gas, but to also consider the flow dynamics aspects, which can significantly affect the processing quality and processing time.
The drilling nozzle of the Precession Elephant 2 has been designed to precisely guide the process gas and, together with the system design and configuration, is an important contributor to ensuring optimum results in laser microprocessing.
The protective gas flows through a channel in the drilling nozzle directly onto the workpiece. Due to the compression of the protective gas, the nozzle exit pressure is significantly higher than the ambient pressure. This underexpanded flow behavior is evident by the formation of a compression structure that is similar in shape to polished diamonds and leads to the creation of so-called Mach discs.
The process gas density is higher within a Mach disc, which results in an improved ablation process in laser material processing.
Through targeted control of the process gas pressure, it is possible to precisely position these Mach discs to suit the specific working distance between the nozzle and workpiece, and to optimize the machining process for each particular system design.
This exact tailoring of the process gas control to the specific application is an important aspect in achieving the highest possible processing quality in laser micromachining.
|Technical specifications||PRECESSION ELEPHANT 2||PRECESSION ELEPHANT|
|Number of axes||8 axes:||5 axes:|
|XYZ coordinates||XYZ coordinates|
|Two beam inclination angles||Two beam inclination angles|
|Two polarization parameters||–|
|Beam attenuation value||–|
|Laser wavelength||343-355 nm (ultraviolet)||–|
|515-532 nm (green)||515-532 nm (green)|
|1020-1080 nm (near infrared)||1020-1080 nm (near infrared)|
|1500-2100 nm (infrared)||1500-2100 nm (infrared)|
|Laser pulse energy||300 µJ||100 µJ|
|Average power||100 W||40 W|
|Pulse length||250 fs to 20 ps||500 fs to 10 ps|
|Adjustment of the spot geometry and beam caustic||Manual and motorized||Manual|
|Focal length of objective lens||60 mm or 120 mm, second generation||60 mm or 120 mm|
|Focal diameter||10 to 30 µm||20 to 40 µm|
|Polarization in the focus||Circular or elliptical, with optional electronic control||Circular, manually adjustable|
|Z positioning||+/- 1mm electrical, +/- 2 mm manual||+/- 1mm electrical, +/- 2 mm manual|
|Maximum mechanical Z velocity||500 mm/s||200 mm/s|
|Theoretical Z positioning resolution||30 nm||30 nm|
|Aperture||26 mm||21 mm|
|Precession frequency||200 - 600 Hz (12 000 - 36 000 rpm), depending on incidence angle||200 Hz (12 000 rpm)|
|Max. precession angle (full cone angle)||18°||14°|
|Field size||0.8 mm to 3.0 mm, depending on nozzle||0.8 mm to 2.0 mm, depending on nozzle|
|Hole diameter accuracy||< 0.2 µm||< 0.25 µm|
|Step width adjustment of hole diameter||0.015 µm||0.1 µm|
|Purge gas (head/lens)||Air or nitrogen||Air or nitrogen|
|Process gas||Air, nitrogen or shielding gas||Air, nitrogen or shielding gas|
|Process gas pressure||Any, 0 to 4 bar||Any, 0 to 4 bar|
|PROCESS CONTROL OPTIONS|
|Customized suction cups for integrated particle extraction with external pressure control||Customized suction cups for integrated particle extraction|
|Through-the-lens vision module with internal sample illumination||–|
|Polarization control for sharpest edges over complete circumference||–|
|High-speed laser stop for consistent edge results on exit surface||–|
|Energy monitor for long-time process stability||–|
|Optical beam attenuator||–|
|Plasma emission sensor||–|
|Single pulse energy measurement sensor||–|
|Beam position and profile monitor||–|
|Two alignment cameras for beam adjustment||–|
|Beam position and beam profile monitoring||-|
|Automatic calibration of the beam position and direction||–|
|Available as scan head||Available as scan head|
|Available as scan head, adjusted to your laser source||Available as scan head, adjusted to your laser source|
|Available as scan head with matched |
laser and beam path
|Available as scan head with matched laser and beam path|
|Stationary or moveable mounting||Stationary or moveable mounting|
|XY table control|
|Beam splitter control|
|Control of external acousto- and electro-optical modulators|
|User interface||InScript® V3 with precession drill nodes||InScript® V2 with Spiro3D nodes|
|Network||Controller lib via TCP/IP||Controller lib via TCP/IP|
|PLC||Profibus, EtherCAT, 24V||Profibus, EtherCAT, 24V|
|System control||System Controller ASC-2||System Controller ASC-2|
|Inputs (ASC-2)||RS232, CAN/CANopen, Ethernet (TCP/IP), Profibus, EtherCAT, digital inputs (TTL up to 24V)||RS232, CAN/CANopen, Ethernet (TCP/IP), Profibus, EtherCAT, digital inputs (TTL up to 24V)|
|Outputs (ASC-2)||RS232, CAN/CANopen, Ethernet (TCP/IP), Profibus, EtherCAT, analog outputs (0-10V), digital outputs (TTL up to 24V)||RS232, CAN/CANopen, Ethernet (TCP/IP), Profibus, EtherCAT, analog outputs (0-10V), digital outputs (TTL up to 24V)|